Water-cooled piston.



G. D. POGUE.-

} WATER COOLED PISTON.

' APPLICATION FILED APR. 17.1915.

Patented 1&Iay, 2,-19 16.

w fiaeitizij eai ge specification of Letters Patent.

Application filed April 17, 19i5. Serial No.-2 1',987.

Yb all concern: i

lie itknown that 1,- Gnonen D. Poems, a citizen of the 'llfnitedg'states, residing at St. Horus, Missouri, have-im'epted a, certain new and" useful Improvement in W'ater-Cooled' Pistons, of which'the following is" a full, clear, .and:.-exact description, such as will enable :othrsskilled in the art to which it 4 appertains to make and use the same. .This invention relates to Water-cooled pistons" ofthe type that are equipped with two "extensible water conduits for conducting the cooling Waterto and fronithe water chamber-in the piston, each of said conduits consisting of a dependingtubeon the piston that is a-rranged'in telescopic relation with a stationary tube.

In water-cooled pistons of the general type mentioned great Slflll and'care has to be exercisedin' positioning the. cooperating stationary 'and;jniovable water tubes so that theywill telescope freely without binding or causing thetjubes' to become bent or the connectionsbetwee'n same and theparts on which they are nijounted strained when the piston is in-ope'ration, owing to thefact that the-movable tubes are "rigidly connected to the pistonand the stationary t'ubes are rigidly connected to a supporting structure which remains, at rest whenthe piston is in operation. Slight inaccuracies in machining frequently result indainage or breakage of the water tubes of pistons of the type mentioned, and very often the cooperating tubes are thiQw rout'of,accurate aline-Inent by a slight rota'i'v'nioveinent of the piston. caused by wear on the ,wrist pin. A

'The'niain' object of my present invention j is tohprovide'a watercooled piston of the ggneigal type mentioned, in which the water conduits aresofdsigned that they will not bedamaged. or brbkcn by inalalineinent or slight inaccuracies infn achining of the inovy tubes constituting said able end-es conduits r p Another;rob ct said tube to bend or its connection'with said stationary; tubes-bf the conduit aiie not in absolute longitudinal ali-nement or concentric relationwith each other. And still another object is to provide a water-cooled form on i 1 r b f de.a l-e e s e water, v-condu t for water-cooled pistons which is so designed that one of the tubes of samiQ fingmoxge Slightly with relation to the pa f as' cl ira sa t. Yi h i taca l mgt pal-t1 :to be; strained, ,case the megabit and which one of the watertubs is provlded piston of the general type lrnentionedin l with twov tubular-shaped portions arranged one inside of the other and connected to-, gether at one end, 'one of 'said'tubular shaped j portions-being connected at its 'opposite 'end.

to the part that carriessaid tube, thusde'av mg the other tubular-shaped portionfree to move slightly with relation to the part that carries the tube. Y

Other objects and desirable features oi my I inventionwill be hereinafter pointed out;

"Figure 1 of the drawingsjisa vertical-sec tional View ofa water 'cooledpistonf constructed 1n accordance w1thmy invention.

Figs. 2 and3 are: similar views, illustratingj slight modifications of my inv'ention; *Fig. 4:"

is a detail vertical sectional view,- i'1lustrat-* ing one manner of forming-the lnovabletube of the piston shown inF-igl; and Fig-bis a detail vertical sectional view, illustratingone manner of forming the*m'ova-ble' tube" of the .piston shown in Fig. 2;

I have herein illustrated iny present; in'

vention embodied in 1 a- Water-t'zooled piston of the general design illustrated' -and de-= scribed inmypendin'g application-forwater cooled pistons, .Seria'l #966, filed January 7 1915, which piston is providedwith a cas-"' ing for receiving and collectingany wat'e'r;

that leaks out of the joint-between'thecow operating stationary and movable tubes that e'ofthe water conduits of the piston, the stationary tube'and thewateficollecting' casing that surrounds sanie'bothbeing provided with stufling boxes through whichthe Scottie afi n i ea h a I g,,l LF 1 of the which'illustrates astern of I 1 A designates trunlg -type a p d adi n iit li u e iieed. TY fl water space or, chamber' l through -wh1c cooling water circulates-When the piston or H I in operation; The coolingwater is "supplied to said water space and conducted away 1 from same by means of two extensible conduits, each of which is formed by a station-- ary tube 2 that is provided at its upper end with a stalling box through which a depending tube on the piston A passes. Each of sald water conduits is provided with a casing I that surrrounds the stationary tube :2, so as to receive and collect any water that leaks through the stufling box 3 when the packing of same becomes worn, said casing -t being preferably provided at its upper end with a stufling box 5 through which the depending tube on the piston A passes, so as to eliminate any possibility of water escap-' ing into the crank case of the engine. the packing of said stalling box 5 operating to wipe otf any water ormoisturewhich mightremain on the movable tube on the piston A on the upward stroke of the piston.

In order to overcome the objectionable results occasioned by malalinement of the cooperating movable and stationary tubes of the water conduits or slight inaccuracies in the machining of said parts. I have constructed the water conduits of my improved piston in such a manner that one tube of each conduit can move slightlvwith relation to the part that carries same without-liability of straining the connection between saidtube and part or subjecting either tube of the conduit to side thrusts or strains which might tend to bend them. I can accomplish this. desirable --result in various ways. and while I prefer tomount the movabletube, or. in other words. the tube on the piston, in such a imanner that the portion of same which cooperates with the stationary tube can move or yield slightly with relation to the piston, I do not wish it to be understood that my broad idea is limited to such a structure, for the same results can be accomplished in various ways without departing from the spirit of my invention.

In the form of my invention illustrated in Fig. 1 the movable tube of each conduit is pro'videdwith two tubular-shaped portions a and 1) arranged one within the other and having their lower ends connected together at 7. as shown in Fig.1. The outer portion 7) of said tube is snugly embraced by the stuffing boxes 3' and 5 of the stationary tube 2 and the casing 4:, respectively. and the upper end of theinner tubular-shaped portion a of said tube isrigidly connected in any suitable manner to the bottom wall of the water space 1 in the piston A. The upper .end of the outer portion 7) of the movable tube is free. and as said outer portion 7) is connected to the inner portion a at only one pointfnamelv. at the lower'end of same.'said oute-r 'portion' bran, move or flex slightly with relation to the inner portion (1 which is rigidly connected to the piston without liability of straining the joint between the portion aand the pistonand without liability of distorting or permanently bending either tube of the conduit, in case said tubes are not in absolute longitudinal alinement or concentric relation with each other. In other words; the movable tube of the conduit consists of two tubular-shaped portions arranged one inside of the other and connected together at one end, the portion which is not engaged by the stufling boxes '3 and 5 being secured to the piston, and thus acting as a support for the other portion. so

as to hold same in position, but still permit it'to bend or move sufliciently to compensate for slight inequalities in the alinement of the movable. and stationary tubes. It is immaterial how the two portions (1 and b of the movable tube are joined together. but one convenient way of forming the movable tube is to form same from pieces of tubing whose lower ends are brazed. soldered or riveted together. as shown in Fig. r.

If desired, the movable tube of any improved conduit can consist of an inner tubu lar-shaped portion a that passes through the stufling boxes 3 and fipreviously mentioned. and an outer tubular-shaped porti n JO nected to the piston to permit the inner por-- tlona tomove or flex sufficlently to compensateior inequalities in alinement; of the.

two tubes without danger of distorting either tube or straining the connection between the movable tnbe and the piston on which it is mounted.

,If desired, one portion of the, movable tube can be formed by a corrugated tubularshaped member, as illustrated in Fig. 3. wherein the portion 7/ of the movable tube that is connected to the piston is provided with annular corrugations that add greatly to the flexibility of the'tube. i

Awater-cooled piston of the construction above described is a decided improvement on the water-cooled pistons of this general type which are now in general use. owing to the fact that each water conduitv of same is so constructed that there is no danger of the two cooperating tubes constituting same becoming bent or strained or the connccthms with their suplmrting parts broken. in case the tubes are not in absolute ltmgitudinal alinement and-concentric relation witheach other. I

Having thus} described what I claim. and desire to secure by Letters Patent. is: y I 1. A water-cooled piston provided with an extensible water cmiduit composed of a my invention.

. await-abate afsta'tionaryftubearranged mass" a iritelescopic relation with each 'otheigjone' of saldptubeshavin meanswhieh 'rmi'tssaid tubeto; move-s11 cientl =withre atio'ni'to'the part whlch carriesisam tor-compensate for: slightinaccuracies in the aline'riiejnt of the tubes and-thusgpreventdamage to said tubes',

or straining.v of the connections between said tubes and the parts that carry same. a

2. A, Water-cooled piston provided with an extensible water conduit composed of a stationary tube and a movable tube arranged in telescopic relation with each'other, one

telescopic relation, one of said tubes having a means that causessaid tube to adjust itself automatically to the position of the other tube without liability of straining 'or bending either tube'in" case the tubes are not in absolute longitudinal alinement and concentric relation with each other.

4. A ,w ater co'oled piston provided with'. an extensible conduit composed of a. sta-.

tionary tube anda movable tube, a stufiing box on one of said. tubes through which the other tube projects, and means whereby one.

tube can'move or flex-slightly with relation to thepart which carries same without hability of straining its connection with said part in case said tubes are not in perfect alinement. i

'5. A water-cooled piston provided. with an extensible conduit composed of astationary tube and amovable tube arranged in telescopic relation with each other, one of said tubes being provided with a means that permits said tube toshift laterally shghtly so as to compensate for inequalities in longitudinal a lin'ement' of the tubes without liability of straining the connectionbetween either tube and the part which carries same.

6. A water-cooled piston provided -,'with an extensible water conduit composed of a stationary tube anda movable tube arranged in telescopic relation with each other, one of said tubes having a stufiing' box through which the other tube passes, a supporting member for one tube, 'and means interposed between said supporting member and tube which permits said tube to move or flex slightly to compensate for naccuracies in the alinement of the tubes.

7.-A watercooled piston provided with an extensible conduitcomposed of a statlonany tube and'a movable tube arranged in $5 said tubes having two tubular-"shaped portelescopic relation with each other, one of through which said tube passes.

ma sa edtreasures eak-safes nectedito'getlie'n at onlyfoiieend, thereby per- Y mittingj one of, said tubular-shaped port-ions re v d fl x slightly with relation' to. the iblllah hfill lljort i l A tubes are not; in accurateall 8; A water-cooledpisiton pro extensible conduit composed of a stationary f tube and a 'movable1 tube arranged in tele l scopic relation with each other, one of said tubes having two tubular-shaped portions toa supporting structure. p

. 9. A water-cooled piston "provided wifth 'an extensible water conduit composed of 'two arranged onejwithin the other and connected, I.

together at only one'end, and one of, "said... I port onsbelng connected at its opposite'end telescoped tubes, means for forming a tight joint between saidtubes, a supporting struc ture for-one of said, tubes, and a-jtubular-l shaped member on said supporting*structure to which one end of "said. tube is "con.; nected in such a manner that the free 7 end of same can move with relation to'saiditubu f lar-shaped member.- v I v 1011A water-cooled piston provided with .an extensible water conduit consisting offa 'stationar tube provided with a stufling box," a movab etube that projects throughfsaidl stufling box, and a tubular-shaped support:

ing device for one of said tubes arranged inj v concentric relation with same and connected thereto in such a manner that. said tube has" a certain degree of resiliency or flexibility.

'11. A water-cooled piston provided with stationary tube provided with a stufiing box, a movable tube that passes. through said stufling box, and a tubular-shapedmember on thepiston arranged in concentric relation with said movable tube and connected to one end of same by a joint which is of such a Ian extensible water conduit composed of a"v v character that said movable tube can flex or bend slightly;

12. 'A water coole'd piston provided an extensible water conduit that consists of}.

a stationary tube and a movable tube on thelf' piston that is arranged in telescopic. rela-f,"

tion with said stationary tube, said movable? tube having two tubular-shaped parts one arranged .inside of the other, said parts being connected together at one end and one of said parts being rigidly connected at its op-" posite end to the piston.

13. A water-cooled piston prOvidedwitli- 'a water space',"a dependingwater tube on 7,

said piston that communicates with said water space, and meansfor permitting-said tube to move or flex shghtly with relationto the piston and the stationaryfmember 14. A water-cool d plston provided with": I an extensible. water conduit that consists of a stationary tube. provided with a stuflin box, a movable'tube on'the'piston provide gether at one pointixme of said tubularshaped portions PI'HJOQUDg through the stuflin box in said stationarv tube and the other tulmlar-shaped portion being connected to the piston, and a casing for receiving and collecting any water that escapes through the joint between said tubes.

1.). A water-cooled piston provided with an extensible conduit composed of a stationarv tube provided at its upper end with a stalling box, a movable tube provided with a tulnilar-shaped portion that passesthrough' .-1id stutling box and an inner tubular-shaped portion that is rigidly connected at its upper end to the piston, the lower ends ot'said tuluilar-shaped portions gcther. I

I. A water-cooled piston provided with an extensible water conduit that consists of a stationary tube provided attits upper end 'ith a stufiing box a movable tube that pro- .j-ects through said stuliing box. and a tububeing joined tolar-shaped member on the piston Surrounding said movable tube and connected to th upper end of same at a point some distance,

from the connection between said tubularshaped member and the piston. v

17. A water-cooled piston )rovided with an extensible water conduit that consists oi a stationary tube provided at its upper end with a stufiing box, a movable tube that roects through sa d stufilng box, and a tubular-shaped member on the plston surrounding said movable tube and connected to the upper end of same at a point some distance from the connection between said tubularshaped member and the piston, said tubu' lair-shaped member being provided with corrugations.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses, this fourteenth day of 1 )ril, 1915.

' GEOR E D. POGUE.

Witnesses:

Wicugs L. CHURCH, GEORGE BAKEWELL. 

